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Craig 3
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Re: Decisions, decisions...
Reply #3 - Sep 14th, 2017 at 9:50am
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Run times depend, of course, on amount of gas charge in the tank and engine speed, but with the right engine and prop combination you can usually get around two minutes. At low RPM I've gotten three minutes out of the big twin
  
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Re: Decisions, decisions...
Reply #2 - Sep 14th, 2017 at 7:50am
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These little CO2 motors look like lots of fun. Never seen one up close and will have to look around some. Any motor run times?
  

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Sky9pilot
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Re: Decisions, decisions...
Reply #1 - Sep 13th, 2017 at 11:32pm
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Great collection you have there.  I sent you an email and hopefully we can get your laptop back up and running with S&T.  Thanks for posting the pics of these great little motors!!!
Tom
  

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Craig 3
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I Love YaBB 2.5 AE!

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Decisions, decisions...
Sep 13th, 2017 at 4:01pm
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I'm doing this from the phone while we sort out the IT issues, so please bear with me Smiley I haven't started a CO2 build yet, but I'm fascinated by these little Expanding Gas Reciprocating Engines and I've collected a few, and the plans and/or kits I'm considering.
The Gasparin GMW73 TRV twin with the gas valve throttle and two tanks is a powerhouse- handbuilt by Stefan Gasparin hisself and one of not many with a gas valve. It will lift a pretty good sized AC and is tentatively slated for a Herr J3 cub.
The little Telco single isn't the piece of art the Gasparin is, but it runs good and might find a home in a Jetco peanut Dayton-Wright RB1,
The big Russian DP-O3 might as well be made of cast iron- It strong like Russian wife and needs to be in something light with a bunch of wing.
The tiny little Brown Campus A-23 is a sweetheart- 7.4g with the tank & prop and I'm thinking it might be fun in a Megow diner- I have printwood for a Taylor Cub and the plans are out there.
The last one is a G-Mot GM120T- The "factory-built" iteration of a Gasparin and it'll handle a fair sized model too and may be the one I do my first build for. I found loose printwood for a 3/4" scale Cleveland (yeah-another Cleveland) Aeronca C-3 and have the plans en route. I think those little jugs would be PERFECT hanging out of the cowling!
Meanwhile, Since we're just getting this CO2 thing rolling, I'm looking for a 1mm Brown charger and an 8x8 1/2 Gasparin prop.i look forward to getting back to building and felliwshipping with y'all!
  

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